Made from high-density polymer foam that ensures a long product lifespan, it allows riders to confidently tackle even the most challenging trails and terrains. The Airliner provides a robust barrier between the rim and the tire, offering unprecedented protection against punctures, sidewall slicing, and pinch flats. The Air-Liner Protect has been carefully designed to reduce unnecessary weight from the tire and wheel system. With its new "T"-shaped design, Air-Liner Protect offers improved shock absorption, so you can handle the toughest terrain with ease. The Air-Liner Protect Trail provides the ultimate balance of protection, performance, and lightweight design, specifically developed for the demands of mountain biking. Compatible only with tubeless tires and multiway tubeless valves – a 40mm valve is included in the scope of delivery.